I had an ... wait, my DAD had an OO gauge Hornby when we were kids. It was in the loft and was a decent two-ring affair with a three-track station, a shunting yard and a fiddle yard. We ran diesel models on it, including a 125 and an APT (yes, I know that's electric).
Later in life I got into modelling a bit with some 48 scale aviation stuff and brushed up against the rail guys again. Got bored and played guitar instead.
Nowadays, my rail modelling is 100% Brio with a SHITLOAD of Thomas engines courtesy of a rail-obsessed four year-old. Both of us like going to model rail shows. He gets very excited. Got to get him over to York soon.
Nidge